Under Roberts Rules of Order, a member voting in the ^winning side^ of a question can petition the chair for reconsideration and change his/her vote as long as it occurs within the same session.
The chair may or may not allow that change.
Smart parties always have one “stealth vote” on cententious issues.
Watched President Trump speaking to the Black Leadership Summit and heard a shout of Where We Go One. Didn’t hear the rest of it. Q is reaching many. Good job FreeQers!